190326-时刻与时间间隔-22160735

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190618-静摩擦力-20160416

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20190618-自由落体运动-10160602

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190423-动能和动能定理-21160930

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190329-速度：平均速度，瞬时速度-22160731

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190326-运动快慢的描述-22160737

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190326-速度-07160211

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190604-磁场复习-22160704

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190423-匀变速直线运动的位移与时间的关系-22160740

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